#MISS'S Model #2830 designer planter Filo Port Plug ~ Double Wall Design Planting basin Water Reservoir Channel Overflow Drainage Overtire Plug Water Reservoir © Built-in water reservoir and overflow drainage hole. » Avoid using garden doll or top soil for container planting, its often too dense:and restricts air circulation: A'potting mix is strongly recommended and will ensure better plant growth. » Rinse clean with a garden hose: for a deeper clean.